Who鈥檚 afraid of energy labelling? | 好色先生TV

Table 1 The six base scenarios
听		Three glazing scenarios
听		% internally measured transparency
听		100	75	40
Two system scenarios	Displacement ventilation and chilled beams	100	75	40
听	Fan-coil unit	100	75	40

Table 2 The 18 carbon reduction strategies
好色先生TV services	Envelope
1 Lighting load reduced from 15W/m2 to 12W/m2	13 Use of internal shading devices
2 Chiller EER* improved from 2.5 to 3.4: air-cooled	14 Use of external shading devices
3 Chiller EER* improved from 2.5 to 4: air-cooled	15 U-value of glazing improved from 2.2 to 1.8
4 Chiller EER* improved from 2.5 to 5: water-cooled	16 Solar control glazing (g %3D 0.37; solar %3D 0.6)
5 Boiler efficiency improved from 81% to 89%	17 Air permeability rate improved to 5m3/hr/m2
6 SFP reduced from 2.0W to 1.5W	18 Air permeability rate improved to 3m3/hr/m2
7 Heat recovery (plates-65%; SFP%3D2.0)	EER: energy efficiency ratio
8 Heat recovery (plates-65%; SFP%3D2.5)	AHU: air handling unit
9 Leakage test ductwork improved to Class B	SFP: specific fan power
10 AHU** air-leakage test improved to Class L1	BMS: building management system
11 Lighting metering provided and connected to BMS	g: emmisivity
12 Power factor improved to %3E 0.95W	Solar: solar transmission coefficiency

Table 3 - Carbon Reduction ranked according to cost effectiveness
听		*Cost of initiative (£/m2 GIFA)**	Carbon emissions reduction (kg of CO2/m2/pa)	Investment effectiveness (kg of CO2 reduction/£)	Cost of initiative (£/m2 GIFA)	Carbon emissions reduction (kg of CO2/m2/pa)	Investment effectiveness (kg of CO2 reduction/£)
Glazing proportion		40% glazing			100% glazing
Part L compliant emissions		40kg			43kg
1	Reduce lighting load by 20%	3.52	-4.8	1.4	3.52	-4.3	1.2
2	Improve AHU leakage to class L1	0.40	-0.4	1.0	0.40	-0.4	1.1
3	Substitute chilled beams for 4-pipe fan coils	8.75	-8.0	0.9	8.75	-8.0	0.9
4	Specify solar control glazing, g %3D 0.37	6.13	-2.8	0.5	15.32	-4.7	0.3
5	Boiler efficiency improved to 89%	0.90	-0.4	0.4	0.90	-0.4	0.5
6	Solar control glazing	6.13	-2.4	0.4	15.32	-4.7	0.3
7	Specific Fan Power reduction to 1.5	6.90	-2.0	0.3	6.90	-2.2	0.3
8	Water cooled chiller ERR %3D 5	12.58	-4.0	0.3	12.58	-4.7	0.4
9	Power Factor correction improved to %3E0.95	3.40	-0.8	0.2	3.40	-0.9	0.3
10	Improve ductwork leakage to Class B	6.50	-0.4	0.1	6.50	-0.4	0.1
11	External shading devices	30.88	-2.8	0.1	30.88	-5.6	0.2
12	Internal blinds	5.36	-0.4	0.1	13.41	-0.4	0.0
听	Total cost of carbon reduction initiatives	91.45	听	听	117.88	听	听
* GIFA: gross internal floor area

Table 4 - Assessment of occupier benefits of reduced carbon emissions *
听	Annual saving £/100m2	Present value of saving £ total**
25% carbon reduction
Gas and electricity	730	£1,640,000
Carbon	0.88***	£2,000***
50% carbon reduction
Gas and electricity	1,460	£3,280,000
Carbon	1.75***	£3,900***
* Based on the 40% glazed option
** Calculated on the basis of GIFA %3D 11,250m2, and a year's purchase @ 5%
*** Calculated on the basis of *1.25/EU emissions allowance (equivalent to 1 tonne of carbon emissions)